前言
这篇博客针对《c++ OpenGL GLFW三维skybox场景obj模型AABB碰撞检测动画界面》编写代码，代码整洁，规则，易读。 学习与应用推荐首选。
运行结果
文章目录
一、所需工具软件
二、使用步骤
1. 主要代码
2. 运行结果
三、在线协助
一、所需工具软件
1. VS2019, Qt
2. C++
二、使用步骤
代码如下（示例）：
void initOpenGLWindow() {
myWindow.Create(1920, 1080, "Proiect OpenGL");
glfwSetWindowPos(myWindow.getWindow(), 100, 100);
glfwGetFramebufferSize(myWindow.getWindow(), &retina_width, &retina_height);
}
void setWindowCallbacks() {
glfwSetWindowSizeCallback(myWindow.getWindow(), windowResizeCallback);
glfwSetKeyCallback(myWindow.getWindow(), keyboardCallback);
glfwSetCursorPosCallback(myWindow.getWindow(), mouseCallback);
}
void initOpenGLState() {
glClearColor(0.7f, 0.7f, 0.7f, 1.0f);
glViewport(0, 0, myWindow.getWindowDimensions().width, myWindow.getWindowDimensions().height);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
glfwSetInputMode(myWindow.getWindow(), GLFW_CURSOR, GLFW_CURSOR_NORMAL);
}
void initModels() {
terrain.LoadModel("objects\\terrain\\terrain.obj", "objects\\terrain\\");
terrain_trees.LoadModel("objects\\terrain_trees\\terrain_trees.obj", "objects\\terrain_trees\\");
eliceMoara.LoadModel("objects\\elice\\elice_moara.obj", "objects\\elice\\");
bmwBody.LoadModel("objects\\bmw\\bmw_body.obj", "objects\\bmw\\");
bmwTire.LoadModel("objects\\bmw\\bmw_tire.obj", "objects\\bmw\\");
tree1.LoadModel("objects\\tree1\\Tree.obj", "objects\\tree1\\");
tree2.LoadModel("objects\\tree2\\Tree.obj", "objects\\tree2\\");
faces.push_back("textures/skybox/posx.jpg");
faces.push_back("textures/skybox/negx.jpg");
faces.push_back("textures/skybox/posy.jpg");
faces.push_back("textures/skybox/negy.jpg");
faces.push_back("textures/skybox/posz.jpg");
faces.push_back("textures/skybox/negz.jpg");
mySkyBox.Load(faces);
}
void initShaders() {
basicShader.loadShader("shaders/basicShader.vert", "shaders/basicShader.frag");
fragmentDiscardingShader.loadShader("shaders/fragmentDiscardingShader.vert", "shaders/fragmentDiscardingShader.frag");
skyboxShader.loadShader("shaders/skyboxShader.vert", "shaders/skyboxShader.frag");
depthMapShader.loadShader("shaders/depthMap.vert", "shaders/depthMap.frag");
screenQuadShader.loadShader("shaders/screenQuad.vert", "shaders/screenQuad.frag");
screenQuad.LoadModel("objects/quad/quad.obj");
}
void initUniforms() {
basicShader.useShaderProgram();
view = myCamera.getViewMatrix();
viewLoc = glGetUniformLocation(basicShader.shaderProgram, "view");
glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));
model = glm::mat4(1.0f);
modelLoc = glGetUniformLocation(basicShader.shaderProgram, "model");
glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
normalMatrix = glm::mat3(glm::inverseTranspose(view * model));
normalMatrixLoc = glGetUniformLocation(basicShader.shaderProgram, "normalMatrix");
glUniformMatrix3fv(normalMatrixLoc, 1, GL_FALSE, glm::value_ptr(normalMatrix));
projection = glm::perspective(glm::radians(45.0f), (float)retina_width / (float)retina_height, 0.1f, 1000.0f);
projectionLoc = glGetUniformLocation(basicShader.shaderProgram, "projection");
glUniformMatrix4fv(projectionLoc, 1, GL_FALSE, glm::value_ptr(projection));
lightDir = glm::vec3(-80.0f, 100.0f, 0.0f);
lightRotation = glm::rotate(glm::mat4(1.0f), glm::radians(lightAngle), glm::vec3(0.0f, 1.0f, 0.0f));
lightDirLoc = glGetUniformLocation(basicShader.shaderProgram, "lightDir");
glUniform3fv(lightDirLoc, 1, glm::value_ptr(glm::inverseTranspose(glm::mat3(view * lightRotation)) * lightDir));
lightColor = glm::vec3(1.0f, 1.0f, 1.0f);
lightColorLoc = glGetUniformLocation(basicShader.shaderProgram, "lightColor");
glUniform3fv(lightColorLoc, 1, glm::value_ptr(lightColor));
fragmentDiscardingShader.useShaderProgram();
view = myCamera.getViewMatrix();
viewLocFragmentDiscarding = glGetUniformLocation(fragmentDiscardingShader.shaderProgram, "view");
glUniformMatrix4fv(viewLocFragmentDiscarding, 1, GL_FALSE, glm::value_ptr(view));
model = glm::mat4(1.0f);
modelLocFragmentDiscarding = glGetUniformLocation(fragmentDiscardingShader.shaderProgram, "model");
glUniformMatrix4fv(modelLocFragmentDiscarding, 1, GL_FALSE, glm::value_ptr(model));
projection = glm::perspective(glm::radians(45.0f), (float)retina_width / (float)retina_height, 0.1f, 1000.0f);
projectionLocFragmentDiscarding = glGetUniformLocation(fragmentDiscardingShader.shaderProgram, "projection");
glUniformMatrix4fv(projectionLocFragmentDiscarding, 1, GL_FALSE, glm::value_ptr(projection));
}
void initFBO() {
glGenFramebuffers(1, &shadowMapFBO);
glGenTextures(1, &depthMapTexture);
glBindTexture(GL_TEXTURE_2D, depthMapTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, SHADOW_WIDTH, SHADOW_HEIGHT, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
float borderColor[] = { 1.0f, 1.0f, 1.0f, 1.0f };
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glBindFramebuffer(GL_FRAMEBUFFER, shadowMapFBO);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthMapTexture, 0);
glDrawBuffer(GL_NONE);
glReadBuffer(GL_NONE);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
glm::mat4 computeLightSpaceTrMatrix() {
glm::mat4 lightView = glm::lookAt(lightDir, glm::vec3(0.0f), glm::vec
运行结果
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